.

• One of the common and

widely used input device.

• The keyboard is divided into

different areas.

• The most common names

for keyboards is QWERTY.

Advantages :

• A keyboard is usually supplied with computers

• People are used to using keyboards to enter data.

Disadvantages:

• Mistakes are easily made

• Excessive use can lead to R.S.I

• Keyboards are not suitable for creating diagrams

• The mouse is also one of the

most common input devices used.

• Also known as the pointing

device.

• Enables you to control what

happens on the screen and what

to point at.

• Ideal for use with desktop

computers

• Users are familiar with the

mouse

• It is faster than using a

• Overuse can lead to R.S.I.

• Is not accurate in drawings.

• Is not easy and convenient

to insert text.

Inkjet Laser

Quiet Speed ( moves more quickly)

Fast Precision

Cheap Economy

Good quality Excellent quality

Inkjet Laser

Ink may be smudged Expensive

Good quality paper needed Cartridges are quite expensive

display resolution

Advantages Disadvantages

Cheap CRT is abit more dull than LCD

Displays everything you are doing

Consumes a lot of power

communication